Quito's historic, main square dates back to the 16th century.

This 12-inch-tall wooden sculpture of a winged Virgin Mary has inspired much devotion and countless replicas.

This unusual piece of Renaissance art depicting the bodily horror of crucifixion and skin disease may have been inspired by fungus-induced hallucinations.

The birthplace of the builder of the Statue of Liberty is now a museum dedicated to his work.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Special benches that play Chopin's music are scattered throughout his native city.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

This antique thermometer honors the creator of the first universal temperature scale.

This 13th century Gothic brick castle is the largest in the world by surface area.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

The oldest church in Mantua was buried for centuries under the facades of other structures.

The seat of the Mantua bishop holds many secrets within its walls.

This massive blockhead sculpture hides an entire library.

A patchwork of ruins from various civilizations in one of the world's oldest continually inhabited cities.

Inmates dig the graves at the largest prison cemetery in the U.S., the final resting place of both cowboys and Indians.

An ancient Phoenician citadel once stood at the site where Queen Dido first landed, according to legend.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.